Mesa modbus and pktUart

vre
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1 year 7 months ago #323859 by vre

Replied by vre on topic Mesa modbus and pktUart

Yes correct does not work reliably to 115200 the problem appears to 9600 default speed and 32 i/o of module work fine the time bugs appears.
Problem maybe is not noise related because changing the order
of function lines without changing functions or pins in pin file the problem appears elsewhere..
Also appears in encoder of P1 port and eletech is connected to P3 via ttl to modbus adapter.
Chanching the ordering of functions in constant ModuleID : ModuleIDType without changing pin entries
changes the problem.
From that tests i have done is not due noise but software related maybe some data are written or read from wrong place.

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PCW
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1 year 7 months ago #323861 by PCW

Replied by PCW on topic Mesa modbus and pktUart

OK I'll add this to the list of known Mesa modbus bugs.

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vre
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1 year 7 months ago #323862 by vre

Replied by vre on topic Mesa modbus and pktUart

Is this due to hostmot2 firmware or hostmot2 driver of linuxcnc ?

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PCW
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1 year 7 months ago #323863 by PCW

Replied by PCW on topic Mesa modbus and pktUart

Most likely the driver (that has a number of known bugs)

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vre
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1 year 7 months ago #323864 by vre

Replied by vre on topic Mesa modbus and pktUart

the test was done with master version
2.9.4 will have the same bug or to try my luck ?

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PCW
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1 year 7 months ago #323866 by PCW

Replied by PCW on topic Mesa modbus and pktUart

There have been no changes in mesa modbus that I know of
so all bugs are unchanged. I guess one possible workaround
until this can be fixed is to set the pktuart as the last module.

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vre
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1 year 7 months ago #323867 by vre

Replied by vre on topic Mesa modbus and pktUart

With this config
I have crazy data to encoder.00.input-a and encoder.00.input-b like the first video
encoder.00.position and encoder.00.velocity seems unaffected it will work if noise is
only to encoder.00.input-a and encoder.00.input-b ?

Code:

(HM2DPLLTag, x"00", ClockLowTag, x"01", HM2DPLLBaseRateAddr&PadT, HM2DPLLNumRegs, x"00", HM2DPLLMPBitMask),
(WatchDogTag, x"00", ClockLowTag, x"01", WatchDogTimeAddr&PadT, WatchDogNumRegs, x"00", WatchDogMPBitMask),
(IOPortTag, x"00", ClockLowTag, x"03", PortAddr&PadT, IOPortNumRegs, x"00", IOPortMPBitMask),
(QcountTag, x"02", ClockLowTag, x"08", QcounterAddr&PadT, QCounterNumRegs, x"00", QCounterMPBitMask),
(StepGenTag, x"02", ClockLowTag, x"04", StepGenRateAddr&PadT, StepGenNumRegs, x"00", StepGenMPBitMask),
(PWMTag, x"00", ClockHighTag, x"08", PWMValAddr&PadT, PWMNumRegs, x"00", PWMMPBitMask),
(LEDTag, x"00", ClockLowTag, x"01", LEDAddr&PadT, LEDNumRegs, x"00", LEDMPBitMask),
(PktUARTTTag, x"02", ClockLowTag, x"01", PktUARTTDataAddr&PadT, PktUARTTNumRegs, x"00", PktUARTTMPBitMask),
(PktUARTRTag, x"02", ClockLowTag, x"01", PktUARTRDataAddr&PadT, PktUARTRNumRegs, x"00", PktUARTRMPBitMask),

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PCW
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1 year 7 months ago #323868 by PCW

Replied by PCW on topic Mesa modbus and pktUart

I doubt it, if any read data is corrupted, all data is suspect.

Can you run this command when LinuxCNC and modbus is running:

sudo tcpdump -c 100 -xx -i eno1 > dump.txt

( substitute your Ethernet device name for eno1 )

and post dump.txt here?

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vre
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1 year 7 months ago #323870 by vre

Replied by vre on topic Mesa modbus and pktUart

This is dump
Also in this thread seems to have same problem(encoder reads crazy data with pktuart enabled and in working state)
forum.linuxcnc.org/24-hal-components/527...r-count-interference

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PCW
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1 year 7 months ago #323879 by PCW

Replied by PCW on topic Mesa modbus and pktUart

Can you also include the exact .mod file that you are using?

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